Improvement in the manufacture of elastic rolls



N. PETERS, PHDTO-UTHOGRAFNER, WASHINGTON. D C.

tuted gaat JAMES B. Fousrirnyor Boston; Massiienusnrrs.-

Letters Patent No. 101,994, dated April 19, 1870.

IMPROVEMENT IN 'ran Manus-Aereas or nLAsTIc ROLLS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern .ter ot' the same.

Figure 3 is a transverse section on the line x x of My invention has for its object to prevent the slipping of the roll upon its shaft, and' consists in forming the basis of the roll ci' semi-elastic material, secured to the shaft by wire, string, or in any other suitable manner, a cement composed of metallic lings, sal ammoniac, and sulphur, (with or without rubber,)` being first laid upon the shaft to enable the semi-elastic basis to adhere thereto with greater tenacity, whereby -I am enabled toproduce a strong and durable elastic roll at a much less cost than where the interior or basis of the roll is composed wholly of rubber.

Vv'lo enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings- A is a metallic shaftor mandrel, of suitable size, covered with a coating, a, of cement, composed of rubber, (one ounce,). lilings of metal, (one pound,) sal ammoniac, (two ounces,) and sulphur, (one ouuce,) mixed together', and reduced to a semi-liquid state with naphtha.

The shaft so coated should now be set aside for a day or two, toallow the cement to properly set-, after which is laid 0nthe basis B o'f the roll or portion intended to form its interior, which is composed of semi-elastic material, with cloth, duck, or other suitableimaterial interposed ornot.

Next, I bind or secure this semi-elastic basis to its shaft 'or mandrel, by winding a wire, l), spirally outside theformer, the end of the wire being securely fastened to the shaft.

A coat, c, of ordinary cement, (India rubber comup with cloth or duck, coated with rubber, so arranged that the bers Will radiate from the center, the outer ends of the fibers being exposedon its outer surface, and serving as a most reliable means of securely holding the covering thereto, as fully described in Letters Patent of the United States,No.' 59,798, granted to me on the 20th day of` November, A. I). 1866.

'Ihe roll is now wrapped invcloth, or put into a mold, and cured or vulcanized, by which process the whole is fused or united into one solid and compact mass.

A metallic cement may be made in which the rubber and naphtha are omitted, and Water used instead, but when the rubber is not employed, the cement is not so tenacious.

The action of the metallic cement is to corrode the shaft, and produce inequalities in its surface, so that itv will iirmly cling thereto.

The semi-elastic'nterior or basis of the roll unites with the metallic cement, and tenaciously adheres thereto; but to guard against a possibility of its getting loose, a suitable fastening may be employed for Securing it in place.

lhe elastic stock, which forms the covering of the roll, also adheres irmly to' the cement laid upon the semi-elastic interior, f and the roll thus made,after being properly vulcanized, vwill not be liable to turn or become loose en its shaft when subjected to any strain it is intended to bear.

The semi-elastic material forming the basis of the roll is composed of the following ingredients, viz:

Rubber, white oxide of zinc, sulphur, and cotton, or other fibrous material, the whole ground together, and then run into sheets, or coated on cloth.

The above-named ingredients I prefer, as I believe they produce the best results, but one or more of' them may be omitted, and other substances may be substituted therefor.

India rubber, if highly compounded, becomes semi-elastic after being cured; the ingredients mentioned will, however, make a very tough and durable roll.

lSometimes it may be necessary'or useful to apply a coat of common cement over the metallic cement before laying on the semi-elastic interior or basis of the roll, and to still further provide against the liability of the roll becoming loose and slipping on its and durable roll at a much less cost than a roll as heretofore constructed, in which the interior or basis is composed wholly of rubber Without fibrous material Also, the within-described cement, composed of the being mixed therewith.

ingredients and mixed in about the proportions set forth. v Clam Witness my hand this 22d day 0f Maren, A. D. Vhat I claim as my invention, and desire to secure 1870.- by Letters Patent, is-

An elastic roll, the vbasis of which is composed of semi-elastic material, with cloth, duck, or other suit- Witnesses: able material interposed or not, .tncl'secured to the N. W. STEARNS, shaft, substantiallyy as set forth. W. J. CAMBRIDGE.

JAMES B. FORSYTH. 

